1. Precautions
1-1 Safety Precautions
1. Be sure that all of the built-in protective
devices are replaced. Restore any missing
protective shields.
2. When reinstalling the chassis and its
assemblies, be sure to restore all protective
devices, including: nonmetallic control knobs
and compartment covers.
3. Make sure that there are no cabinet openings
through which people—particularly
children—might insert fingers and contact
dangerous voltages. Such openings include
the spacing between the picture tube and the
cabinet mask, excessively wide cabinet
ventilation slots, and improperly fitted back
covers.
If the measured resistance is less than 1.0
megohm or greater than 5.2 megohms, an
abnormality exists that must be corrected
before the unit is returned to the customer.
4. Leakage Current Hot Check (Figure 1-1):
Warning: Do not use an isolation
transformer during this test. Use a leakage-
current tester or a metering system that
complies with American National Standards
Institute (ANIS C101.1, Leakage Current for
Appliances), and Underwriters Laboratories
(UL Publication UL1410, 59.7).
5. With the unit completely reassembled, plug
the AC line cord directly into the power
outlet. With the unit’s AC switch first in the
ON position and then OFF, measure the
current between a known earth ground (metal
water pipe, conduit, etc.) and all exposed
metal parts, including: antennas, handle
brackets, metal cabinets, screwheads and
control shafts. The current measured should
not exceed 0.5 milliamp. Reverse the power-
plug prongs in the AC outlet and repeat the
test.
Fig. 1-1 AC Leakage Test
6. Antenna Cold Check:
With the unit’s AC plug disconnected from the
AC source, connect an electrical jumper across
the two AC prongs. Connect one lead of the
ohmmeter to an AC prong. Connect the other
lead to the coaxial connector.
7. X-ray Limits:
The picture tube is especially designed to pro-
hibit X-ray emissions. To ensure continued
X-ray protection, replace the picture tube only
with one that is the same type as the original.
Carefully reinstall the picture tube shields and
mounting hardware; these also provide X-ray
protection.
8. High Voltage Limits:
High voltage must be measured each time ser-
vicing is done on the B+, horizontal deflection
or high voltage circuits. Correct operation of
the X-ray protection circuits must be
reconfirmed whenever they are serviced.
(X-ray protection circuits also may be called
“horizontal disable” or “hold-down”.)
Heed the high voltage limits. These include
the X–ray Protection Specifications Label, and
the Product Safety and X-ray Warning Note on
the service data schematic.
Precautions
Samsung Electronics
1-1
LEAKAGE
CURRENT
TESTER
DEVICE
UNDER
TEST
TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
EARTH
GROUND
(READING SHOULD
NOT BE ABOVE
0.5mA)
Follow these safety, servicing and ESD precautions to prevent damage and protect against potential
hazards such as electrical shock and X-rays.
Summary of Contents for SP47W3HFX/COM
Page 2: ...ELECTRONICS Samsung Electronics Co Ltd Nov 2002 Printed in Korea 3J52A SESA 47W3 ...
Page 11: ...Reference Information Samsung Electronics 2 5 2 3 MICOM IIC BUS LINE UP ...
Page 12: ...Reference Information 2 6 Samsung Electronics MENO ...
Page 45: ...Alignment and Adjustments Samsung Electronics 4 29 Power 4 8 2 CHINA ...
Page 49: ...Alignment and Adjustments Samsung Electronics 4 33 ...
Page 50: ...Alignment and Adjustments 4 34 Samsung Electronics ...
Page 51: ...Samsung Electronics 4 35 ...
Page 52: ...Alignment and Adjustments 4 36 Samsung Electronics ...
Page 68: ...Alignment and Adjustments 4 52 Samsung Electronics MENO ...
Page 72: ...MEMO 5 4 Samsung Electronics ...
Page 85: ...Samsung Electronics Block Diagrams 8 1 8 Block Diagram 8 1 Main Signal Progressive ...
Page 86: ...Block Diagrams 8 2 Samsung Electronics 8 2 Video Signal ...
Page 87: ...Samsung Electronics Block Diagrams 8 3 8 3 Sound Signal ...
Page 88: ...Block Diagrams 8 4 Samsung Electronics 8 4 Power Supply C ...
Page 89: ...Samsung Electronics Block Diagrams 8 5 8 5 In Out by Block 8 6 Signal Connection by Block ...
Page 90: ...Samsung Electronics Wiring Diagrams 9 1 9 1 Pcb Connection Progressive 9 Wiring Diagram ...
Page 91: ...10 Schematic Diagrams Samsung Electronics Schematic Diagrams 10 1 10 1 MAIN 1 ...
Page 92: ...Schematic Diagrams 10 2 Samsung Electronics 10 2 MAIN 2 ...
Page 93: ...Samsung Electronics Schematic Diagrams 10 3 10 3 MAIN 3 TP02 TP01 TP01 TP02 ...
Page 94: ...Schematic Diagrams 10 4 Samsung Electronics 10 4 MAIN 4 ...
Page 95: ...Samsung Electronics Schematic Diagrams 10 5 10 5 MICOM CS with out TTX TP04 TP03 TP03 TP04 ...
Page 96: ...Schematic Diagrams 10 6 Samsung Electronics 10 6 MICOM CS with in TTX TP04 TP03 TP03 TP04 ...
Page 97: ...Samsung Electronics Schematic Diagrams 10 7 10 7 MICOM CW ...
Page 98: ...Schematic Diagrams 10 8 Samsung Electronics 10 8 POWER ...
Page 99: ...Samsung Electronics Schematic Diagrams 10 9 10 9 POWER with in PFC ...
Page 100: ...Schematic Diagrams 10 10 Samsung Electronics 10 10 SOUND ...
Page 101: ...Samsung Electronics Schematic Diagrams 10 11 10 11 CRT ...
Page 104: ...Schematic Diagrams 10 14 10 13 SUB 2 TP14 TP13 TP13 TP14 ...
Page 106: ...Schematic Diagrams 10 16 Samsung Electronics 10 15 A V TERMINAL ...
Page 108: ...Schematic Diagrams 10 18 Samsung Electronics 10 17 CONVERGENCE SDC11 1 2 ...
Page 109: ...Samsung Electronics Schematic Diagrams 10 19 10 18 CONVERGENCE SDC11 2 2 ...
Page 110: ...Schematic Diagrams 10 20 Samsung Electronics 10 19 PERFECT FOCUS PHOTO SENSOR INTERFACE BOARD ...
Page 111: ...Samsung Electronics Schematic Diagrams 10 21 10 20 AV FRONT ...
Page 112: ...Schematic Diagrams 10 22 Samsung Electronics 10 21 CONTROL VM CONTROL VM ...
Page 113: ...Samsung Electronics Schematic Diagrams 10 23 10 22 DW 1 ...
Page 114: ...Schematic Diagrams 10 24 Samsung Electronics 10 23 DW 2 ...
Page 117: ...Samsung Electronics Schematic Diagrams 10 27 10 25 SUB AMP PFC SUB AMP PFC ...
Page 118: ...Schematic Diagrams 10 28 Samsung Electronics 10 26 FORMAT CONVERTER ...